Automatic cooling system



Nov. 15, 1927.

W. W. MUIR AUTOMATIC COOLING SYSTEM Filed Aug. 24, 1923 I WWMuiI' at. my

Patented Nov. 15, 1927.

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nni'rso STATES PATENT OFFlCE.

WELLINGTON W. MUIR, OF LOCKTORT, NEW YORK.

AUTOMATIC COOLING SYSTEM.

Application filed August 24,1923. Serial No. 659,217.

This invention relates to improvements in internal combustion engines, and has forlts objectto provide a device which will 1mprove the operation, construction, and the manufacture of said engines and their coacting parts.

lVith these and other objects in view, the invention. consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification:

Figure 1 is a view of the radiator taken on the line 44 of Fig. 2, looking in the direction of the arrows; and

Figure 2 illustrates an engine cooling system made in accordance with this invention.

Referring to the drawings, 40 represents the engine jacket, 42 a radiator provided with a space in its top divided by a partition illustrated in dotted lines, and a pair of vertically disposed tanks 48' and 49 connected with said divided space, 41 indicates a pipe connected to the jacket and one of the divisions of said space, 43 a pipe connected to the lower portion of the tank 48, 44 a pump joined to the pipe 43, and 45 indicates a pipe joining said pump and the upper portion of the jacket, 46 represents a pet cock connected with the jacket and 47 indicates a filling cap.

The radiator side tanks or passages 48 and 49 are connected by the cross passages 50 leading into said sideppassages or tanks and the shell of the jacket is divided into two portions as indicated by the parting line 51.

The said pipe 45 leads into the upper portion. of the shell of the jacket while the pipe 52 leads from the lower portion of the jacket shell to the radiator, as shown. Said pipe 43 7 leads from the lower end of the radiator where it joins the side tank 48, and said pipe 52 leads to the side tank 49 at a short distance from the bottom of the radiator. The

said pipe 52 thus constitutes a large gravity feed passage to be disclosed more fully below. A valve 53 controls the flow of liquid through the pipe 52 from the jacket and this valve is controlled by the spring 54 which in turn is controlled by the accelerator rod 55. Said accelerator rod may be actuated by either a foot pedal or a hand lever (not shown) located in any convenient position for the driver. It is evident that the control of the rod 55 will through the connections 56 and 57 control the valve 53, and thus will the flow of liquid to the bottom portion of the radiator be controlled. The rod 55 is connected to the rod 58, pivoted at 59 and said rod 58 has pivoted thereto the rod .60 which in turn is'pivoted to the rod 61 controlling the throttle valve 62. It therefore results that when the valve.53 is moved the throttle valve 62 is also moved, and therefore, the speed of the motor is controlled. 63 indicates a choke valve'connected to the rod 64 pivoted to the rod 65 and said rod is provided with any suitable means such as a fork 66 straddling the member 56 and adapted to operate said member 56 through the abutment 67 independently of the rod 55. The operation of this invention is as follows: The system when not active may be tilled through filler cap 47 to the levelof the pet cock 46. l Vhen the motor is started the liquid will circulate from the lower portion of the jacket 40 past the valve 53 in the 52, into the lower portion of radiator tank 49 and through the lower passages 50 or said radiator to the lowest portion of tank 48 and thence through passage 43 t0 the pump 44, whence it passes up through the pipe 45 to the upper division of the jacket shell 40. i

The rate of circulation will depend on the position of the valve 53 which has a tendency to close as the power output of the motor is decreased through the manipulation of the throttle valve 62. This tendency in turn reduces the circulation of liquid through the radiator 42 in relation to the power output, or in relation to the position of the throttle 62 associated with the carburetor 68. To insure a rapid warming up of the system when the motor is first started, the choke valve 63 associated with the carburetor 68 may be closed by means of the rod 65 which is connected to a handle not shown. The closing of this valve 63 is simultaneous with the closing of the valve. 53 but is independent of the throttle valve 62 due to the fact that the rod 70 is slidably connected with the hollow tube 56 which is in contact with the fork 66 through the adjustable stop 67 When the motor is thus warmed up and the choke valve 63 has been opened, the spring 54 will cause the hollow tube 56 to move toward the right as seen in Fig. 2 until the adjustable stop 67 carried thereby will contact withthe fork 66. This movement will control the position of the output is had.

throttle valve 62 in the carburetor through the sliding connection 70, and the rods 58, 60 and 61, all as will be clear tromrFig. 2. There are a number of holes 71 in the member 57 in order that the end of the hollow tube 20 can be adjusted to properly control the two valves 53 and 62 in unison. If it is desired, the entire system can be filled with liquid and the circulation be made to be through the pipe 41, into the space above the tank 49 in the top of the radiator 42, through tank 49, radiator tubes 50, tank 48, passage 43, pump 44 and passage 45 back to the jacket independently of the position of the v.- valve 53 by properly adjusting said valve 53.

The advantages of this particular system reside in the fact that when it is only partially filled with liquid and the valve 53 is closed by means of the choke operating rod v 65 or by means of the throttle operating rod 55 there will be insured a rapid warming up of the liquid. When the motor is operated at partial loads and the throttle valve 62 is partially closed, the valve 53 will also close and reduce the circulation thus tending to prevent a rapid cooling off of the liquid in the system.

Still further advantages of this system are found in the following: lVhen it is desired to obtain a maximum heat output the entire system can be filled with liquid which will increase the circulation through the system. On the other hand, when the system is partially filled with liquid the return circulation is controlled by the action of gravity through the pipe 52 and valve 53 and is rather sluggish so that by this means a much lesser. heat But when the system is filled with liquid the circulation is forced and this tends to speed up the passage of the liquid and thus to increase the dissipation of heat. This last mentioned action also brings into operation the upper part of the radiator, which under other conditions or when the system is only partially filled, is not working. Under operating conditions where the system is only partially filled, one has really only about one half or" the radiator active and a very slow circulation or heat output is obtained which may be still further reduced by manipulating the valve 53.

It will thus be seen that one may by this method and means, attain such a complete control over the heat output of the engine as to change it at will for the changing conditions and load on the engine.

That is claimed is:

1. In a cooling system for internal combustion engines the combination of a acket; a radiator provided with a pair of tanks at its side edges and transverse passages connecting sa1d tanks; a connection between the upper portion of said jacket and one of said nection between the upper portion of said 7;-

jacket and one of said tanks; a connection between the lower portion of said jacket and said last named tank; a valve for controlling said last named connection; means for operating said valve at will; a pump; a connection between the bottom of the other of said tanks and said pump; and a connection between said pump and the top portion of said jacket.

3. In a cooling system for internal combustion engines the combination of a jacket; a radiator provided with a pair of tanks at its side edges and transverse passages con necting said tanks; a connection between the upper portion of said jacket and one of said tanks; a connection between the lower portion of said jacket and said last named tank; a valve for controlling said last named connection; means for operating said valve at will; a throttle valve; a common means for operating said first and second named valves; a pump; a connection between the bottom of the other of said tanks and said pump; and a connection between said pump and the top portion of said jacket.

4. In a cooling system for internal combustion engines the combination of a jacket; a radiatorprovided with a vertically disposed tank on each side edge of the same and cross fiow passages connecting said tanks; a pipe connecting the top of said jacket with the top of one of said tanks; a pump; a pipe connecting the bottom of the other of said tanks with said pump; a pipe connecting the top portion of said jacket with said pump; a pipe connecting the lower portion of said jacket and said first named tank; a valve for controlling said last named pipe; a throttle valve; common means for operating said first and second named valves; and means whereby said first named valve may be operated independently of said throttle valve.

In testimony whereof I afiix my signature.

WELLINGTON W. MUIR.

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